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About the compatibility of polymer components in polymer complexes based on poly(acrylamide) and poly(vinyl alcohol)
Author(s) -
Demchenko Ol'ga,
Kutsevol Nataliya,
Zheltonozhskaya Tatyana,
Syromyatnikov Vladimir
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200103)166:1<117::aid-masy117>3.0.co;2-2
Subject(s) - vinyl alcohol , polymer , polymer chemistry , materials science , acrylamide , glass transition , vinyl polymer , intermolecular force , copolymer , chemical engineering , compatibility (geochemistry) , molecule , chemistry , organic chemistry , composite material , engineering
The issue of applying the usual concepts of polymer compatibility to nonstoichiometric PVA/PAA mixtures of chemically complementary poly(vinyl alcohol) and poly(acrylamide), which form in water solution InterPC (intermolecular polymer complex) stabilyzed by H‐bonds, and PAA to PVA graft copolymers (PVA‐PAA N ) with different grafted chains number N, that are IntraPC (intramolecular polymer complexes) is discussed. PVA and PAA are compatible on molecular level. At the same time PVA/PAA mixture (50/50 W/W) is characterized by heterogeneous structure consists of InterPC with ϕ char =9g PVA /g PAA and the excess of unconnected PAA. In the case of IntraPC, yet, only PVA‐PAA N , where N=25, is characterized by a single glass transition temperature (Tg). At larger values of N separate PAA domains form giving rise to the corresponding Tg. These results are discussed in view of IntraPC structure peculiarities as a function of N investigated by IR spectroscopy.